You only have until October 20 to request new forms, and they must be received by the ABS by 6pm on November 7.

Tuesday 19, 11.51am: THERE are a few ways you can ensure your Australian Marriage Law Postal Survey forms get to you.

If your postal vote form hasn't arrived by September 25, you can call the information hotline 1800 572 113 or go online to order a new form.

A new form will be issued to you.

If you think your address on the electoral roll may be incorrect and your forms have been sent to an old address, you can fix it now by calling 1800 572 113 or go online.

Each vote form has an individual barcode, If you have been sent forms and they have gone astray, the barcode on the missing forms will be struck out, making that vote invalid.

The new forms you will receive will have your valid barcode on them

Monday 18, 12 noon: WITH people reporting on social media they haven't received their forms for the Australian Marriage Law Postal Survey, we thought we'd take a look when you should expect them to arrive, and what to do if they don't.

If you were enrolled on the Commonwealth Electoral Roll, or made a legitimate application for enrolment, by 24 August 2017, you should receive a postal vote in the mail - only one postal vote per eligible Australian

Mailing of forms began on September 12 in a staggered delivery schedule, and should be received by September 25.

If you have not received your postal vote by that date, you can contact 1800 572 113.

October 20 is the final day for requesting or picking up replacement forms.

Postal votes must be mailed by October 27 and received by November 7. The ABS cannot accept surveys received at the address after 6pm (local time) on that date.

Results will be published on the Australian Bureau of Statistics website on November 15.

Filling out the form is simple - there is only one question - "Should the law be changed to allow same-sex couples to marry?".

Using a dark pen, mark either yes or no to the question.

Put your form in the reply paid envelope and mail it back, no postal stamp required.

To ensure your vote is counted, follow some simple rules; mark only one box and make sure the barcode is not missing or altered. Also, don't add anything to the envelope - glitter was suggested as a form of protest, but will only raise the ire of those having to open the envelopes.

Participation in the survey is voluntary, forms should be destroyed if you don't complete them.

There is support available for people with an illness, injury or disability who may find completing a postal survey more difficult.

The ABS is working in partnership with the National Relay Service (NRS) to help people who are deaf or have a hearing or speech impairment to complete the survey.

The NRS is a confidential, 24-hour service, available anywhere in Australia.

To make a call:

TTY/voice calls 133 677

Speak & Listen 1300 555 727

SMS relay 0423 677 767

You can also ask a trusted person (a family member or friend) to help you to complete your survey, or to complete the survey on your behalf.

Online or telephone response

Between September 25 and October 20 2017, people with an illness, injury or disability can also request a Secure Access Code via the online enquiry form or by calling the Information Line. If you are deaf, or have a hearing or speech impairment, please contact us through the National Relay Service.

An email or SMS, including a unique 16-digit Secure Access Code will be sent to your nominated email address or mobile. The code can be used to provide an anonymous survey response through an automated telephone service, a secure online form or via a ABS Customer Assistance Team.